11681400806 has 16 divisors (see below), whose sum is σ = 17692758720. Its totient is φ = 5784085440.

The previous prime is 11681400799. The next prime is 11681400833. The reversal of 11681400806 is 60800418611.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19010 + ... + 154026.

It is an arithmetic number, because the mean of its divisors is an integer number (1105797420).

Almost surely, 2^11681400806 is an apocalyptic number.

11681400806 is a deficient number, since it is larger than the sum of its proper divisors (6011357914).

11681400806 is a wasteful number, since it uses less digits than its factorization.

11681400806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135439.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 11681400806 in words is "eleven billion, six hundred eighty-one million, four hundred thousand, eight hundred six".